2218390684 has 12 divisors (see below), whose sum is σ = 3955432824. Its totient is φ = 1088267024.

The previous prime is 2218390667. The next prime is 2218390709. The reversal of 2218390684 is 4860938122.

It is a self number, because there is not a number n which added to its sum of digits gives 2218390684.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5231842 + ... + 5232265.

It is an arithmetic number, because the mean of its divisors is an integer number (329619402).

Almost surely, 2^2218390684 is an apocalyptic number.

It is an amenable number.

2218390684 is a deficient number, since it is larger than the sum of its proper divisors (1737042140).

2218390684 is a wasteful number, since it uses less digits than its factorization.

2218390684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10464164 (or 10464162 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 2218390684 is about 47099.7949464751. The cubic root of 2218390684 is about 1304.2054506791.

The spelling of 2218390684 in words is "two billion, two hundred eighteen million, three hundred ninety thousand, six hundred eighty-four".